Design And Implementation Of Ultrasonic Synthetic Aperture Imaging Based On FPGA

Ultrasound synthetic aperture imaging algorithm has the advantages of high imaging quality,strong penetration and high detection accuracy in the field of non-destructive testing,and is one of the research hotspots at present.Ultrasound synthetic aperture imaging is mainly used in railway,aerospace,nuclear industry and other industrial fields.Because of the large amount of data,the imaging efficiency is low.In order to improve the imaging efficiency,this paper studies the technology of ultrasonic synthetic aperture imaging based on FPGA.This technology can improve the imaging efficiency on the premise of ensuring the imaging quality.Firstly,this thesis introduces the application status of ultrasound synthetic aperture imaging algorithm in nondestructive testing.Secondly,the imaging principle of ultrasound synthetic aperture is discussed,and the implementation scheme of imaging system to improve imaging efficiency is proposed.The hardware design of imaging system is completed.Finally,the experiment is carried out to verify the effectiveness of the imaging system.Through theoretical analysis,the processing flow of the improved imaging algorithm is obtained.Through experimental verification,it is concluded that under the same parameters,the processing flow of the improved imaging algorithm is used to process the data,which consumes 1/3 of the processing flow of the conventional imaging algorithm and achieves the purpose of improving the imaging efficiency.According to the processing model of the imaging algorithm obtained from theoretical analysis,an ultrasonic imaging system based on FPGA is established.Firstly,the imaging system is divided into modules according to different functions.Secondly,each module is logically described by Quartus II software to realize the functions of each sub-module.Finally,the sub-module is instantiated and the imaging system is designed to improve the imaging efficiency.Establish different experimental models and verify the imaging system.Finally,it is concluded that the imaging efficiency of the ultrasound imaging system based on FPGA is improved,and the purpose of improving the imaging efficiency is achieved.This thesis demonstrates the feasibility of using the imaging system based on FPGA to improve the imaging efficiency in the field of non-destructive testing,and provides a feasible design scheme for the imaging system design based on FPGA.